The transaxle fluid temperature (TFT) sensor is a thermistor circuit. When the sensor is cold, it has a high resistance and high sensor voltage. As the temperature increases, this resistance and voltage decreases. The PCM supplies a 5-volt signal to the sensor, which is also connected to ground. The PCM reads the voltage drop on the sensor signal lines to determine the corresponding temperature.
The TFT sensor is continuously checked when
the ignition is ON.Important
Visually inspect the transaxle fluid temperature
wires for evidence of shorts to battery/ignition voltage. Shorts to battery/ignition
voltage will skew the sensor resistance and eventually cause DTC P0711 to set.Important
DTC P0714 sets when the PCM/TC has detected 2 consecutive occurrences of the 0.2 volts or 10 degree change, within 1 second.
Visually inspect the transaxle fluid temperature wires for damage. Wiggle the wires while observing the scan tool and watch for a sudden shift in temperature.